next.js

cd5d2210 - Allow for parsing app route strings with and without slot names. (#92327)

Allow for parsing app route strings with and without slot names. (#92327) The old impl has a boolean arg that was always true. To support some fixes to routing I need to make the parser sometimes allow for slots but still not things like route groups. I am generalizing the function implementation to have a filter type that decides whether the input string is allowed to have certain types such as route groups and slot names. All the existing uses still disallow any non-url path segments.